You can use many of the activities for projects. You may think that learners who take online courses lack group experience on projects. This thought isn't entirely correct. Projects can be set up for groups, and various communication tools in Moodle help members work together. In a traditional classroom setting, learners don't often meet after class. Instead, they use current social media to communicate, which is what Moodle learners do.
Encourage your learners to use wikis in group projects. Wikis provide a great resource for brainstorming exercises for projects. Their extensibility allows for learners to upload resources to evaluate, link to the Internet, and start organizing the project.